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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 324 · 40 questions
TalentJR

The method (Start value is 100%): New value after a rise of p%: value + p% of value. After a fall: value − p% of value. Percent change = change ÷ starting value × 100. Two changes a% and b% one after the other: a + b + (a × b) ÷ 100, with a fall counted as minus.

NameDateTime takenScore ___ / 40
  1. 1.A town has 2560 people. Its population grows by 10%. How many people live there now?
  2. 2.A town has 2880 people. Its population grows by 5%. How many people live there now?
  3. 3.The price of a bicycle is ₹4540. It goes up by 10%. What is the new price (in ₹)?
  4. 4.The price of a school bag changes from ₹740 to ₹518. By what percent did it come down?
  5. 5.The price of a school bag changes from ₹2660 to ₹2527. By what percent did it come down?
  6. 6.The price of a bicycle is ₹2640. It goes up by 20%. What is the new price (in ₹)?
  7. 7.The price of a school bag changes from ₹3040 to ₹2584. By what percent did it come down?
  8. 8.The price of a school bag changes from ₹4760 to ₹4522. By what percent did it come down?
  9. 9.A water tank holds 1680 litres. 50% of the water is used. How many litres are left?
  10. 10.A price comes down by 50% and then comes down by 10% more. By what percent has it come down in all? =
  11. 11.A price comes down by 15% and then comes down by 10% more. By what percent has it come down in all? =
  12. 12.A price goes up by 10% and then goes up by 15% more. By what percent has it gone up in all? =
  13. 13.A water tank holds 2060 litres. 40% of the water is used. How many litres are left?
  14. 14.The price of a school bag changes from ₹4960 to ₹5704. By what percent did it go up?
  15. 15.The price of a school bag changes from ₹920 to ₹1150. By what percent did it go up?
  16. 16.A town has 220 people. Its population grows by 5%. How many people live there now?
  17. 17.A shop sells 480 cups of tea a month. Next month it sells 40% more. How many cups does it sell next month?
  18. 18.A water tank holds 3480 litres. 5% of the water is used. How many litres are left?
  19. 19.A price goes up by 30% and then comes down by 5%. By what percent has it gone up in all? =
  20. 20.A town has 120 people. Its population grows by 15%. How many people live there now?
  21. 21.A price goes up by 15% and then goes up by 40% more. By what percent has it gone up in all? =
  22. 22.A price goes up by 20% and then comes down by 15%. By what percent has it gone up in all? =
  23. 23.The price of a school bag changes from ₹340 to ₹238. By what percent did it come down?
  24. 24.A water tank holds 1440 litres. 30% of the water is used. How many litres are left?
  25. 25.A town has 660 people. Its population grows by 5%. How many people live there now?
  26. 26.A town has 940 people. Its population grows by 25%. How many people live there now?
  27. 27.A water tank holds 3000 litres. 20% of the water is used. How many litres are left?
  28. 28.A water tank holds 4600 litres. 15% of the water is used. How many litres are left?
  29. 29.A price goes up by 25% and then goes up by 25% more. By what percent has it gone up in all? =
  30. 30.A water tank holds 2480 litres. 15% of the water is used. How many litres are left?
  31. 31.The price of a bicycle is ₹1100. It goes up by 15%. What is the new price (in ₹)?
  32. 32.A shop sells 3520 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  33. 33.A water tank holds 4100 litres. 40% of the water is used. How many litres are left?
  34. 34.The price of a school bag changes from ₹1860 to ₹2790. By what percent did it go up?
  35. 35.The price of a school bag changes from ₹2680 to ₹2546. By what percent did it come down?
  36. 36.A price goes up by 15% and then comes down by 10%. By what percent has it gone up in all? =
  37. 37.The price of a school bag changes from ₹1800 to ₹1350. By what percent did it come down?
  38. 38.A water tank holds 3360 litres. 15% of the water is used. How many litres are left?
  39. 39.A shop sells 4860 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  40. 40.The price of a school bag changes from ₹1640 to ₹1558. By what percent did it come down?

Answer key

  1. 2816
  2. 3024
  3. 4994
  4. 30
  5. 5
  6. 3168
  7. 15
  8. 5
  9. 840
  10. 55
  11. 23.5
  12. 26.5
  13. 1236
  14. 15
  15. 25
  16. 231
  17. 672
  18. 3306
  19. 23.5
  20. 138
  21. 61
  22. 2
  23. 30
  24. 1008
  25. 693
  26. 1175
  27. 2400
  28. 3910
  29. 56.25
  30. 2108
  31. 1265
  32. 4576
  33. 2460
  34. 50
  35. 5
  36. 3.5
  37. 25
  38. 2856
  39. 5589
  40. 5

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